The role of percentage of PSA reduction after focal therapy using high intensity focused ultrasound for primary localized prostate cancer. Results from a large multinstitutional series

2 Department of Urology, University College London Hospitals NHS Foundation Trust, London, UK 3 Division of Surgery & Interventional Science, University College London, London, UK 4 Department of Radiology, University College London Hospitals NHS Foundation Trust, London, UK 5 Department of Urology, Institut Mutualiste Montsouris and Université Paris Descartes, Paris, France 6 Klinik für Urologie, Luzerner Kantonsspital, Lucerne, Switzerland 7 Division of Surgery, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London,